Over the past several months, the Islamic State, formerly known as ISIS, has been expanding its territory with brutal tactics in Syria and Iraq. With the goal of establishing a Sunni caliphate, the terrorist group is racking up a heavy toll on the Kurds and Christians in the area.

The Islamic state has been seen carrying out mass executions, placing severed heads on pikes, viciously ordering mass conversions leading to evacuations, and now have sparked U.S. military involvement leading to President Obama issuing authorized airstrikes.

Here’s an update on the terrorist group by the numbers:

13,000

The number of square miles thought to be in control of the Islamic State. It is a stretch between Syria and Iraq that is roughly the size of Belgium. Other estimates suggest the real number is closer to 35,000 square miles.

1,922

The number of people killed in Iraq in June according to government figures. Figures show that of the 1,922, 1,393 were civilians, 380 were soldiers, and 149 were police. Another 2,610 people were wounded.

The number of nations where the Islamic State has engaged in fighting. Terrorists have attacked soldiers in Iraq, Iran, Lebanon, Syria, and Turkey.

$2,000,000,000

The approximate value of the Islamic State’s cash and assets, according to estimates from terrorism experts. In June, Islamic fighters captured the city of Musul, looting hundreds of millions of dollars from banks and more from Iraqi military assets.

$3,000,000

The estimated daily revenue of the Islamic State from its oil and gas resources alone. The militants have taken over oil and gas fields across Iraq and Syria. “It now controls a volume of resources and territory unmatched in the history of extremist organizations,” wrote defense expert Janine Davidson of the Council on Foreign Relations. She went on to note that if they continue this pattern, they will be able to exert the same force “far beyond the immediate area.”

3

The number of high-profile jailbreaks carried out by the Islamic State, which led to the freeing of 1,500 insurgents–likely including leaders, bomb-makers, and other militants, according to reports.

0

The number of Christians thought to be left in the city of Mosul, where practicing Christianity now is punishable by death.

Up to 40,000

The number of civilians initially estimated to have been trapped on Mount Sinjar last week. At least 20,000 were reportedly rescued over the weekend by Kurdish rebels; the remaining are still trapped.

At Least 500

The number of Yazidis killed so far by Islamic fighters in northern Iraq. The militants buried some of the Yazidis alive, while others were killed in a mass execution.